status-go/waku/common/const.go

// Copyright 2019 The Waku Library Authors.
//
// The Waku library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The Waku library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty off
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the Waku library. If not, see <http://www.gnu.org/licenses/>.
//
// This software uses the go-ethereum library, which is licensed
// under the GNU Lesser General Public Library, version 3 or any later.

package common

import (
	"time"

	"github.com/ethereum/go-ethereum/crypto"
)

// Waku protocol parameters
const (
	SizeMask      = byte(3) // mask used to extract the size of payload size field from the flags
	signatureFlag = byte(4)

	TopicLength      = 4                      // in bytes
	signatureLength  = crypto.SignatureLength // in bytes
	AESKeyLength     = 32                     // in bytes
	aesNonceLength   = 12                     // in bytes; for more info please see cipher.gcmStandardNonceSize & aesgcm.NonceSize()
	KeyIDSize        = 32                     // in bytes
	BloomFilterSize  = 64                     // in bytes
	MaxTopicInterest = 10000
	flagsLength      = 1

	EnvelopeHeaderLength = 20

	MaxMessageSize        = uint32(10 * 1024 * 1024) // maximum accepted size of a message.
	DefaultMaxMessageSize = uint32(1024 * 1024)
	DefaultMinimumPoW     = 0.2

	padSizeLimit = 256 // just an arbitrary number, could be changed without breaking the protocol

	ExpirationCycle   = time.Second
	TransmissionCycle = 300 * time.Millisecond

	DefaultTTL           = 50 // seconds
	DefaultSyncAllowance = 10 // seconds

	MaxLimitInSyncMailRequest = 1000

	EnvelopeTimeNotSynced uint = iota + 1
	EnvelopeOtherError

	MaxLimitInMessagesRequest = 1000
)